Datasheet LTC3803 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT |
| 页数 / 页 | 16 / 4 — ELECTRICAL CHARACTERISTICS. Note 1:. Note 3:. Note 2:. Note 4:. Note 5:. … |
| 文件格式/大小 | PDF / 173 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. Note 1:. Note 3:. Note 2:. Note 4:. Note 5:. Note 6:. Note 7:. TYPICAL PERFORMANCE CHARACTERISTICS
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LTC3803
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings with these specifi cations is determined by specifi c operating conditions in may cause permanent damage to the device. Exposure to any Absolute conjunction with board layout, the rated package thermal impedance and Maximum Rating condition for extended periods may affect device other environmental factors. reliability and lifetime.
Note 3:
TJ is calculated from the ambient temperature TA and power
Note 2:
The LTC3803 is tested under pulsed load conditions such that TJ ≈ TA. dissipation PD according to the following formula: The LTC3803E is guaranteed to meet specifi cations from 0°C to 85°C TJ = TA + (PD • 230°C/W). junction temperature. Specifi cations over the –40°C to 125°C operating
Note 4:
Dynamic supply current is higher due to the gate charge being junction temperature range are assured by design, characterization and delivered at the switching frequency. correlation with statistical process controls. The LTC3803I is guaranteed to
Note 5:
The LTC3803 is tested in a feedback loop that servos V meet performance specifi cations over the –40°C to 125°C operating junction FB to the output of the error amplifi er while maintaining I temperature range, the LTC3803H is guaranteed to meet performance TH/RUN at the midpoint of the current limit range. specifi cations over the –40°C to 150°C operating junction temperature range and the LTC3803MP is tested and guaranteed over the full –55°C to 150°C
Note 6:
Peak current sense voltage is reduced dependent on duty cycle operating junction temperature range. High junction temperatures degrade and an optional external resistor in series with the SENSE pin (RSL). For operating lifetimes; operating lifetime is derated for junction temperatures details, refer to the programmable slope compensation feature in the greater than 125°C. Note that the maximum ambient temperature consistent Applications Information section.
Note 7:
Guaranteed by design.
TYPICAL PERFORMANCE CHARACTERISTICS Reference Voltage Reference Voltage Reference Voltage vs Temperature vs Supply Voltage vs VCC Shunt Regulator Current
820 801.0 804 VCC = 8V T T A = 25°C A = 25°C 800.8 815 VCC ≤ VCLAMP1mA 803 800.6 810 802 800.4 805 801 800.2 800 800.0 800 VOLTAGE (mV) 795 VOLTAGE (mV) 799.8 VOLTAGE (mV) 799 FBV FB FB V 799.6 V 790 798 799.4 785 799.2 797 780 799.0 796 –60 –30 0 30 60 90 120 150 6 6.5 7 7.5 8 8.5 9 9.5 0 5 10 15 20 25 TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) ICC (mA) 3803 G01 3803 F02 3803 G03
Oscillator Frequency Oscillator Frequency Oscillator Frequency vs Temperature vs Supply Voltage vs VCC Shunt Regulator Current
240 210 210 VCC = 8V TA = 25°C TA = 25°C 208 208 230 206 206 204 204 220 202 202 210 200 200 198 198 200 196 196 OSCILLATOR FREQUENCY (kHz) 190 OSCILLATOR FREQUENCY (kHz) 194 OSCILLATOR FREQUENCY (kHz) 194 192 192 180 190 190 –60 –30 0 30 60 90 120 150 6 6.5 7 7.5 8 8.5 9 0 5 10 15 20 25 TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) ICC (mA) 3803 G04 3803 G05 3803 G06 3803fc 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATIONS RELATED PARTS
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings with these specifi cations is determined by specifi c operating conditions in may cause permanent damage to the device. Exposure to any Absolute conjunction with board layout, the rated package thermal impedance and Maximum Rating condition for extended periods may affect device other environmental factors. reliability and lifetime.
Note 3:
TJ is calculated from the ambient temperature TA and power
Note 2:
The LTC3803 is tested under pulsed load conditions such that TJ ≈ TA. dissipation PD according to the following formula: The LTC3803E is guaranteed to meet specifi cations from 0°C to 85°C TJ = TA + (PD • 230°C/W). junction temperature. Specifi cations over the –40°C to 125°C operating
Note 4:
Dynamic supply current is higher due to the gate charge being junction temperature range are assured by design, characterization and delivered at the switching frequency. correlation with statistical process controls. The LTC3803I is guaranteed to
Note 5:
The LTC3803 is tested in a feedback loop that servos V meet performance specifi cations over the –40°C to 125°C operating junction FB to the output of the error amplifi er while maintaining I temperature range, the LTC3803H is guaranteed to meet performance TH/RUN at the midpoint of the current limit range. specifi cations over the –40°C to 150°C operating junction temperature range and the LTC3803MP is tested and guaranteed over the full –55°C to 150°C
Note 6:
Peak current sense voltage is reduced dependent on duty cycle operating junction temperature range. High junction temperatures degrade and an optional external resistor in series with the SENSE pin (RSL). For operating lifetimes; operating lifetime is derated for junction temperatures details, refer to the programmable slope compensation feature in the greater than 125°C. Note that the maximum ambient temperature consistent Applications Information section.
Note 7:
Guaranteed by design.
TYPICAL PERFORMANCE CHARACTERISTICS Reference Voltage Reference Voltage Reference Voltage vs Temperature vs Supply Voltage vs VCC Shunt Regulator Current
820 801.0 804 VCC = 8V T T A = 25°C A = 25°C 800.8 815 VCC ≤ VCLAMP1mA 803 800.6 810 802 800.4 805 801 800.2 800 800.0 800 VOLTAGE (mV) 795 VOLTAGE (mV) 799.8 VOLTAGE (mV) 799 FBV FB FB V 799.6 V 790 798 799.4 785 799.2 797 780 799.0 796 –60 –30 0 30 60 90 120 150 6 6.5 7 7.5 8 8.5 9 9.5 0 5 10 15 20 25 TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) ICC (mA) 3803 G01 3803 F02 3803 G03
Oscillator Frequency Oscillator Frequency Oscillator Frequency vs Temperature vs Supply Voltage vs VCC Shunt Regulator Current
240 210 210 VCC = 8V TA = 25°C TA = 25°C 208 208 230 206 206 204 204 220 202 202 210 200 200 198 198 200 196 196 OSCILLATOR FREQUENCY (kHz) 190 OSCILLATOR FREQUENCY (kHz) 194 OSCILLATOR FREQUENCY (kHz) 194 192 192 180 190 190 –60 –30 0 30 60 90 120 150 6 6.5 7 7.5 8 8.5 9 0 5 10 15 20 25 TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) ICC (mA) 3803 G04 3803 G05 3803 G06 3803fc 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATIONS RELATED PARTS